SureFlap Microchip Pet Door for large cats and small dogsThe new SureFlap Microchip Pet Door is the first to bedesigned to meet the needs of large cats and small dogs.Accessories available to extend and mount onto glass. Please see our shop. Works with a pet's existing identification microchip or RFID collar tag Compatible with all microchip formats worldwide Suitable for multi-pet households (up to 32 pet identities) NEW Curfew Mode: program the door to lock and unlock at specified times NEW Double Lock Mechanism for increased security against intruder animals Fits into doors, windows and walls Battery powered: 12 months typical battery life 3-year warranty.Free Delivery on UK ordersFlap Dimensions178mm (W) x 170mm (H)This dimension is the smallest area of the pet door that your cat will have to enter.Hole Dimensions207mm (W) x 234mm (H)The Installation Template can be used to cut the hole required to fit your pet door.Tunnel's Interior Dimensions188mm (W) x 212mm (H)Tunnel's Exterior Dimensions199mm (W) x 224mm (H)Tunnel Thickness5mmExterior Frame Dimensions262mm (W) x 281mm (H)